20481489

素因数分解:

$3^2\times 7^1\times {\mathrm{151}}^1\times {\mathrm{2153}}^1$

素因数の和:2317

約数の個数: 24

約数和(自身を含む): 34050432

約数和(自身を除く): 13568943

約数列:

[1, 3, 7, 9, 21, 63, 151, 453, 1057, 1359, 2153, 3171, 6459, 9513, 15071, 19377, 45213, 135639, 325103, 975309, 2275721, 2925927, 6827163, 20481489]

約数ペア:

[(1, 20481489), (3, 6827163), (7, 2925927), (9, 2275721), (21, 975309), (63, 325103), (151, 135639), (453, 45213), (1057, 19377), (1359, 15071), (2153, 9513), (3171, 6459)]